TEM asbestos air analysis log, Sample 13, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 8760 Filter Type / Filter .Area: MCE 385 mnV Lab Sample #: 13 GridOpeningSi^ 0.01124

Client Sample #: 13 Area Examined: 0.04496 mm* GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

■GO. Structure structure Type 1 Length ID of Structure N or V EDS (Nonadb No F B C M 1 >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND zi No Coord Elsmsnts)

1

Sti-uct = > 0.5a ^5:1 Aspect Ratio Grid acceptance: 'h Positive diffraction pattern properties conforrtiing to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria Observed <10% padiculatc coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fioer Amosite 6 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C - Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M. = Matrix Actinolite Non-Identified NSD = Nc Structures Detected

CONFIDENTIAL, CITY_21MC100_003430564 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175199